FieldBench
Lennox codes

Lennox

E224

Lockout

Low PS failed CLOSED

Low switch made with inducer off.

Walk E224 in Diagnose

4 plates — walk the one on the cabinet

First check

1 Unplug the switch with the inducer off

On Lennox EL195NE this code is the switch made when the inducer is not running. Unplug that switch only. Unplug the low switch. Water in the hose or a welded switch.

Expect: Code changes when the harness is open.

If fail: Wrong switch, or the IFC input is shorted.

If pass: Switch/hose path. Go to step 2.

The rest of the walkthrough is Diagnose.

On the plates

  • Unplug the low switch. Water in the hose or a welded switch.
  • Inducer still coasting / hose holding residual draft.
  • Unplug it. Water in the hose or a welded disc.

Plates that use E224